We have some legal forms we would like entrants to sign before and/or after participating in contests and sweepstakes conducted on our websites. (We authenticate before any of this, so we'll know their email address, but not necessarily their name.) We would like to avoid physical ink signatures; they add lag time from the mail. We would also prefer to avoid DocuSign type services, too, where users have to sign up for yet another website. Click-through signatures of the "check this box…" variety are too light, because they provide no assurance of identity.
So what does that leave? How can we get an affirmative acknowledgement from a user that they have read and agree to terms, know who the user is, and have it all count as a legal signature according to the American E-SIGN Act of 2000?